From Destinypedia, the Destiny wiki
Archer's Line (referred to as Accelerator during development) is a Fusion Coil Accelerator, a structure built on the Moon during humanity's Golden Age. Although now in a state of disuse, its main function was to fire cargo at high speeds from the surface of the Moon to the outer reaches of the Sol System, where further outposts of Man’s colonial effort required the materials delivered by the Accelerator.
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